To write mathematical formulas in MS Word, users can utilize the built-in Equation editor found under the Insert tab. For those needing more advanced functionality or planning to write frequently, investing time in learning LaTeX is recommended, with LyX suggested as a user-friendly interface for beginners. The Microsoft Mathematics Add-in is also available for additional features. Some users may encounter language discrepancies in program titles, which can complicate finding the Equation editor. Overall, LaTeX and its associated tools are highly praised for their effectiveness in handling mathematical content.